diff --git a/stdlib/Artifacts/src/Artifacts.jl b/stdlib/Artifacts/src/Artifacts.jl
index a9554c95f3151..47812fb993428 100644
--- a/stdlib/Artifacts/src/Artifacts.jl
+++ b/stdlib/Artifacts/src/Artifacts.jl
@@ -56,6 +56,23 @@ function artifacts_dirs(args...)
     end
 end
 
+# Recursive function, let's not make this a closure because it then has to
+# be boxed.
+function parse_mapping(mapping::String, name::String, override_file::String)
+    if !isabspath(mapping) && !isempty(mapping)
+        mapping = tryparse(Base.SHA1, mapping)
+        if mapping === nothing
+            @error("Invalid override in '$(override_file)': entry '$(name)' must map to an absolute path or SHA1 hash!")
+        end
+    end
+    return mapping
+end
+function parse_mapping(mapping::Dict, name::String, override_file::String)
+    return Dict(k => parse_mapping(v, name, override_file) for (k, v) in mapping)
+end
+# Fallthrough for invalid Overrides.toml files
+parse_mapping(mapping, name::String, override_file::String) = nothing
+
 """
     ARTIFACT_OVERRIDES
 
@@ -103,24 +120,9 @@ function load_overrides(;force::Bool = false)::Dict{Symbol, Any}
         # Load the toml file
         depot_override_dict = parse_toml(override_file)
 
-        function parse_mapping(mapping::String, name::String)
-            if !isabspath(mapping) && !isempty(mapping)
-                mapping = tryparse(Base.SHA1, mapping)
-                if mapping === nothing
-                    @error("Invalid override in '$(override_file)': entry '$(name)' must map to an absolute path or SHA1 hash!")
-                end
-            end
-            return mapping
-        end
-        function parse_mapping(mapping::Dict, name::String)
-            return Dict(k => parse_mapping(v, name) for (k, v) in mapping)
-        end
-        # Fallthrough for invalid Overrides.toml files
-        parse_mapping(mapping, name::String) = nothing
-
         for (k, mapping) in depot_override_dict
             # First, parse the mapping. Is it an absolute path, a valid SHA1-hash, or neither?
-            mapping = parse_mapping(mapping, k)
+            mapping = parse_mapping(mapping, k, override_file)
             if mapping === nothing
                 @error("Invalid override in '$(override_file)': failed to parse entry `$(k)`")
                 continue
@@ -743,5 +745,8 @@ artifact_slash_lookup(name::AbstractString, artifact_dict::Dict, artifacts_toml:
 precompile(load_artifacts_toml, (String,))
 precompile(NamedTuple{(:pkg_uuid,)}, (Tuple{Base.UUID},))
 precompile(Core.kwfunc(load_artifacts_toml), (NamedTuple{(:pkg_uuid,), Tuple{Base.UUID}}, typeof(load_artifacts_toml), String))
+precompile(parse_mapping, (String, String, String))
+precompile(parse_mapping, (Dict{String, Any}, String, String))
+
 
 end # module Artifacts